太白山橐吾 tai bai shan tuo wu

Senecillis dolichobotrys (Diels) Kitamura.

Stem erect, 20-80 cm tall, 2-3 mm in diam. at base, glabrous. Basal leaves petiolate; petiole to 15 cm, slender, glabrous, base narrowly sheathed; leaf blade cordate-hastate, 3-11 × 7-14 cm, glabrous, abaxially sometimes hairy only along veins, palmately veined, margin irregularly dentate, apex rounded, mucronate; sinus ca. 1/3 as long as leaf blade, broad; basal lobes divergent, with a coarse triangular tooth on each outer margin. Middle stem leaves reniform, 4-6 × 5.5-11.5 cm, shortly petiolate; sheath enlarged. Distalmost stem leaves smaller, sessile. Synflorescence racemose, to 15 cm; leaflike and supplementary bracts subulate, 2-3 mm; peduncles 1.5-2 mm, shortly pilose or glabrous. Capitula numerous. Involucre narrowly cylindric, 6-7 × ca. 2 mm, outside glabrous; phyllaries 4 or 5, in 2 rows, narrowly oblong, ca. 1.5 mm wide, apex obtuse, purplish brown; inner phyllaries membranous at margin. Ray florets 2 or 3, yellow; lamina oblong or narrowly oblanceolate, to 1 cm × 2-3 mm, apex rounded; tube ca. 5 mm. Tubular florets 2 or 3, 9-12 mm; tube 3-4 mm. Achenes narrowly cylindric, ca. 4 mm. Pappus brown, as long as tube of tubular corolla. Fl. and fr. Jun-Aug. 2n = 58*.

● Stream banks, grassy slopes, forest understories, at base of rocks; 2000-3300 m. ?Henan, S Shaanxi (Qin Ling).